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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/media/media_stream_device_permissions.h"
#include <stddef.h>
#include "base/prefs/pref_service.h"
#include "base/values.h"
#include "chrome/browser/profiles/profile.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/origin_util.h"
#include "extensions/common/constants.h"
#include "url/gurl.h"
bool ShouldPersistContentSetting(ContentSetting setting,
const GURL& origin,
bool is_pepper_request) {
// When the request is from an invalid scheme we don't persist it.
if (!ContentSettingsPattern::FromURLNoWildcard(origin).IsValid())
return false;
// It's safe to persist block settings all the time.
if (setting == CONTENT_SETTING_BLOCK)
return true;
// Pepper requests should always be persisted to prevent annoying users of
// plugins.
if (is_pepper_request)
return true;
// We persist requests from secure origins.
if (content::IsOriginSecure(origin))
return true;
return false;
}
MediaStreamDevicePolicy GetDevicePolicy(const Profile* profile,
const GURL& security_origin,
const char* policy_name,
const char* whitelist_policy_name) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// If the security origin policy matches a value in the whitelist, allow it.
// Otherwise, check the |policy_name| master switch for the default behavior.
const PrefService* prefs = profile->GetPrefs();
const base::ListValue* list = prefs->GetList(whitelist_policy_name);
std::string value;
for (size_t i = 0; i < list->GetSize(); ++i) {
if (list->GetString(i, &value)) {
ContentSettingsPattern pattern =
ContentSettingsPattern::FromString(value);
if (pattern == ContentSettingsPattern::Wildcard()) {
DLOG(WARNING) << "Ignoring wildcard URL pattern: " << value;
continue;
}
DLOG_IF(ERROR, !pattern.IsValid()) << "Invalid URL pattern: " << value;
if (pattern.IsValid() && pattern.Matches(security_origin))
return ALWAYS_ALLOW;
}
}
// If a match was not found, check if audio capture is otherwise disallowed
// or if the user should be prompted. Setting the policy value to "true"
// is equal to not setting it at all, so from hereon out, we will return
// either POLICY_NOT_SET (prompt) or ALWAYS_DENY (no prompt, no access).
if (!prefs->GetBoolean(policy_name))
return ALWAYS_DENY;
return POLICY_NOT_SET;
}
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